RsaKeyPairGenerator r = new RsaKeyPairGenerator(); r.Init(new KeyGenerationParameters(new SecureRandom(), 1024)); AsymmetricCipherKeyPair keys = r.GenerateKeyPair(); AsymmetricKeyParameter private_key = keys.Private; AsymmetricKeyParameter public_key = keys.Public; TextWriter textWriter = new StringWriter(); PemWriter pemWriter = new PemWriter(textWriter); pemWriter.WriteObject(keys.Private); pemWriter.Writer.Flush(); string privateKey = textWriter.ToString(); txtPri.Text = privateKey; TextWriter textpubWriter = new StringWriter(); PemWriter pempubWriter = new PemWriter(textpubWriter); pempubWriter.WriteObject(keys.Public); pempubWriter.Writer.Flush(); string pubKey = textpubWriter.ToString(); txtPub.Text = pubKey;
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引用：
using Org.BouncyCastle.Crypto; using Org.BouncyCastle.Crypto.Generators; using Org.BouncyCastle.OpenSsl; using Org.BouncyCastle.Security;
--XML格式转PEM格式，引用：
public static void XMLConvertToPEM()//XML格式密钥转PEM { var rsa2 = new RSACryptoServiceProvider(); using (var sr = new StreamReader("e:\\PrivateKey.xml")) { rsa2.FromXmlString(sr.ReadToEnd()); } var p = rsa2.ExportParameters(true); var key = new RsaPrivateCrtKeyParameters( new BigInteger(1, p.Modulus), new BigInteger(1, p.Exponent), new BigInteger(1, p.D), new BigInteger(1, p.P), new BigInteger(1, p.Q), new BigInteger(1, p.DP), new BigInteger(1, p.DQ), new BigInteger(1, p.InverseQ)); using (var sw = new StreamWriter("e:\\PrivateKey.pem")) { var pemWriter = new Org.BouncyCastle.OpenSsl.PemWriter(sw); pemWriter.WriteObject(key); } }
网上示例都是从文件读取出XML格式私钥，，存入PEM文件中,PEM中就是转换好的格式。但直接存入string字符串中的代码还没研究出来。 读取XML私钥的代码可以换成生成XML私钥。